Kinetic Gait analysis in Patients with Adolescent Idiopathic Scoliosis and Normal Control Subjects

Document Type : Original Article

Authors

1 Assistant Professor, Department of Biomechanics and Kinesiology, Faculty of physical education and sport science, university of Tabriz, Tabriz, Iran

2 Professor, Department of Biomechanics and Kinesiology, Faculty of physical education and sport science, Bu Ali Sina University, Hamedan, Iran

Abstract

Abstract
Purpose:
In deformed spine of adolescent patients with idiopathic scoliosis, the interaction between the deformity and kinetic aspects during gait has not been well understood. The aim of this study was to analyze the ground reaction force (GRF) during gait in adolescent idiopathic scoliosis (AIS) and healthy control group.
Methods:
Nineteen adolescent female patients with right thoracic idiopathic scoliosis of between 11-16 years of ages as well as 18 healthy females with similar age-matched, height and mass were studied.
Using two Kistler force plates (1000 Hz) and a Vicon system with 4 T series cameras (100 Hz), the GRF and kinematic aspects of subjects’ gait were simultaneously recorded. GRF forces in x (Fx), y (Fy), and z axes (Fz), together with impulse, loading rate, and the asymmetry index (AI) for all variables were evaluated. AI index was calculated with [(Right X – Left X)/ ((Right X + Left X)*0.5)]*100. MANOVA was used to assess the between group differences, Also, repeated measure analysis of variance was used for within group comparisons. Significance level was set at pResults:
In the right foot, all parameters of GRF were similar in AIS and control groups (p>0.05). In the left foot also, Fy and Fx components of GRF were similar between groups (P>0.05). However, the Fz1 parameter of the left foot in scoliosis group was significantly smaller than that of in control group (p=0.03). In the right and left feet, the impulses, loading rate and time related GRF variables were not different between two groups (p>0.05). The AI for all variables were similar in both groups (p<0.05).
Conclusion:
AIS patients demonstrated reduced vertical GRF in left heel contact phase with respect to the control group. Unilateral alteration of the muscle function in the lower limb might be a possible explanation to this abnormality. Further more complex studies are needed to evaluate the origin and consequence of this observation.

Keywords

Main Subjects

References

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Journal of Paramedical Sciences & Rehabilitation
Volume 6, Issue 2
June 2017
Pages 48-59

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